Intelligent Communicator DCR3000

Transcription

1 Intelligent Communicator DCR3000 The Model DCR3000 Intelligent Communicator is designed for data communication over a 4 to 20mA DC output transmission line connected with Hitachi Intelligent Sensor series instruments (Differential pressure/pressure Transmitter, Immersion Type Level Transmitter). It is connected the USB connector of Windows Tablet/PC and operate it from dedicated software. It allows the user to view, change and compare parameters for the Intelligent Sensor series instruments. Also, with this communicator, the user can monitor input/output values and results of self diagnosis and carry out loop check. The collected maintenance control data of instrument can be saved as a text format file or bitmap image format file to any location. SPECIFICATIONS Applicable instruments Intelligent Differential pressure/pressure Transmitter series Intelligent Immersion Type Level Transmitter series Communication Specifications Hitachi's unique communication method (Described in Table 1) Function Described in Table 2 Ambient temperature limits -10~60 Ambient humidity limits 0~95% RH Connector Type (PC side) USB Type A Male Power USB bus power, Current consumption approx 20mA. Weight Approx. 30g Accessories Set up disk Sensor connecting cable (2m, alligator clip) Body fixing fastener (2pc) System Requirements OS Windows 7 / 8 / 8.1, 32 / 64bit, Japanese / English Processor 400MHz(Minimum), 1GHz(Recommended) RAM 96MB(Minimum), 256MB(Recommended) Hard Disk Up to 1GB of available space CD-ROM Drive Use for software setup Internet Explorer 8 or later Windows Installer 3.1 or later.net Framework 3.5 Internet connection or Windows Disk is necessary to enable it, if it is disabled and Windows 8 / 8.1. Display Up to USB port USB 2.0 which corresponds to the Host Function Sound Internal speaker (Recommended for communication sound) User Account Administrator Please prepare the PC which met system requirements on the customer side. The conditions such as the listed temperature are available ranges of this product. Please confirm the condition of the PC to use. Windows and Internet Explorer are either registered trademarks or trademarks of Microsoft Corporation in the United State and/or other countries. 1

2 Communication Signal Communication rate Loop load resistance Communication distance Supplied cable Table 1 Communication specifications Transmission: In 250Ω communication mode ±0.5mA In 50Ω communication mode ±2.5mA Either one is selectable Reception: ±0.5mA 600bps In 250Ω communication mode 250 to 600Ω, with 24V power supply In 50Ω communication mode 50 to 250Ω, with 24V power supply A line resistance value is included in either case. Relationship between Supply Voltage and Load Resistance, refer to Figure km or less (Load capacitance 0.22μF or less, Load inductance 3.3mH or less) 2m (with alligator clips) Item Constant value Table 2 Functions (1/3) Function Processing for Differential pressure/ Processing for Pressure Transmitter Immersion Type Level Transmitter Measurement unit Sets up a measurement unit Fixed at meters(m) TAG No. Sets up a TAG No. Measurement range Sets up a measurement range Output mode Select either Linear/Square root extraction Sensor mounting position Sets up a mounting position Density Sets up density Damping time constant Sets up a damping time constant Set value comparison Reads out data from a connected sensor and compares it with data of the communicator Download Writes data of the communicator to the sensor globally Set data storing Stores data or compares it with held data TAG No. Sets up a TAG No. Measurement unit Static Sets up a measurement unit Pressure Measurement range Sets up a measurement range TAG No. Sets up a TAG No. Flow RTD Sets up a resistance temperature detector Temperature Measurement range Sets up a measurement range Base temperature Temperature/ Pressure compensation Reranging (Tb) Sets up a base temperature Base pressure (Pb) Sets up a base pressure Compensation calculation Sets up a compensation calculation Sets up a measurement range, using the current differential pressure/pressure monitor value as LRV 2

3 Item Monitoring Loop check Adjustment Individual identification Function Output Other Table 2 Functions (2/3) Function Processing for Differential pressure/ Processing for Pressure Transmitter Immersion Type Level Transmitter Input : differential pressure, pressure, Output monitor temperature, static pressure, Input : Water level flow temperature Output : 4 to 20mA Output : 4 to 20mA Monitor data storage Stores input/output monitor value data Self-diagnosis Reads self-diagnostic data LCD check Reads indicate value of LCD Fixed value output Sets output signal at fixed any value temporarily Step output Sets output signal to constant-cycle step form temporarily Zero-point adjustment Adjusts output signal to 0% level on the assumption that the current input is LRV Span adjustment Adjusts output signal to 100% level on the assumption that the current input is URV Zero reset Resets input value to zero when the applied pressure is zero Zero shift Performs zero point shift Static pressure reset Resets static pressure monitor signal to zero when the static pressure is zero Adjustment history data storage Stores adjustment history data Zero elevation Adjusts output signal to any value Specification read-out Reads out Range Code, Serial No., Reads out Standard Range, Serial Revision No. and Total time No. and Revision No. History data read-out Reads out error/maintenance history data and zero shift value Display item Sets up display item Scaling Sets up indication scale and display unit Zero cut Sets up an output cut point on output of square root extraction data Sets up an output less than output cut Output below cut point point on output of square root extraction data Sets up a burnout direction to be taken Burn out on detection of abnormality in self-diagnosis. External Setup Sets up a external setup mode H/L changeover Sets up a pressure input direction (H, L) Alarm value Sets up an upper/lower limit alarm level for input Static pressure select Select output static pressure value Mode Sets up an output mode Screen hard copy Output a bitmap image format file of the currently displayed screen Setting data global output Displays or output a text format file data globally. Stored data function Reads out data, adjustment history data and monitor data from stored data. Displays, outputs or deletes these data. LCD check function Sets up LCD check function 3

4 Item Special functions Table 2 Functions (3/3) Function Processing for Differential pressure/ Processing for Pressure Transmitter Immersion Type Level Transmitter 4mA/20mA calibration Calibrates 0% output current to 4mA or 100% output current to 20mA Adjustment reset Initializes all adjustment values in zero-point adjustment, span adjustment, zero re, zero shift and static pressure re Output range Sets up an output range for burn-out, Sets up an output range for saturation saturation and cutoff and cut-off Water level reference Sets up a reference water level Zero-point Adjusts output signal to 0% level on the Static adjustment assumption that the current input is LRV pressure Adjusts output signal to 100% level on the Span adjustment assumption that the current input is URV Flow Zero-point adjustment Adjusts output signal to 0% level on the assumption that the current input is LRV temperature Adjusts output signal to 100% level on the Span adjustment assumption that the current input is URV Capillary compensation function Sets up the capillary compensation Optional function functions Density compensation function Sets up the density compensation function The items, etc vary according to a connected product and specification. Please refer to Instruction Manual of this product and intelligent sensor to be connected. 4

5 EXTERNAL CONNECTIONS Note 1. The total resistance (loop load resistance) of input load resistance of the distributor and receiving instrument on the same loop and line resistance should be within the allowable range indicated in Figure To reduce a deflection of output indication due to communication signals, it is required to equip the receiving instrument with a low-pass filter having a time constant of approx. 0.1 sec. 3. If the loop load resistance is less than 250Ω, the 50Ω communication mode is selectable. However, since the signal level from the communicator becomes higher, output indication may deflect on the receiving instrument. So, use the 50Ω communication mode after making sure that no trouble will occur in the system. Figure 1 Relationship between Supply Voltage and Load Resistance 5

6 REMARKS ON CONNECTIOINS Depending on the output transmission loop configuration of a sensor instrument, the following caution should be observed. (1) Where the loop load resistance is less than an allowable level for communication If the loop load resistance is less than 50Ω in the 50Ω communication mode. If the loop load resistance is less than 250Ω in the 250Ω communication mode. Even if the loop load resistance is in a range of 50Ωto 250Ω, output indication may deflect due to communication signals in the 50Ω communication mode to cause an adverse effect on system operation.in this case also, follow the instructions given below. In these cases, insert a resistor to the transmission loop as shown in Figure 2 so that the loop load resistance will be within an allowable range of communication. Add a resistor between points A and A or between points B and B. In this arrangement, communication is permitted by connecting the communicator on the left side of A-B (on the side of transmitter or immersion type level transmitter). Figure 2 Addition of Resistor to Output Transmission Line (between A and A') 6

7 (2) Where a capacitor having a relatively large value is connected in parallel to the input load resistance in the receiving instrument on the transmission loop. (e.g., Flying-capacitor input scheme) Figure 3 shows the equivalent input circuit. Even if the input load resistance R is within an allowable range of communication, the capacitor C may absorb the signal frequency component used in communication to disable it. Z = R 1+(2πfCR) 2 E A Ω Z :AC impedance Ω R :Input load resistance Ω C :Capacitance [F] f :Communication frequency of 600 [Hz] Figure 3 Equivalent Input Circuit of Receiving Instrument (3) Where the output transmission loop has an inductance load having a relatively large value: (e.g., Electropneumatic converter) Communication is disabled if signal frequency components are reflected by the inductance load (more than 80mH). In this case, online communication is impossible. If it is necessary, disconnect an instrument of the inductance load temporarily to provide a loop arrangement having resistance load only. Then, connect the communicator to the loop. (4) Where external induction noise is given to the output transmission line If induction noise due to commercial power frequency (particularly due to frequency components near the communication frequency of 600 Hz) is applied, it may become impossible to distinguish between the communication signals and noise, resulting in communication being disabled. Also, if high-frequency noise is applied, the communicator or sensor instrument may malfunction to disable communication. To prevent the above condition, provide the output transmission line apart from such a noise source as heavy-duty electric devices or large-power lines. For protection against induction noise, use shielded cables or metallic conduits. 7

8 DIMENSIONS [Unit : mm] CODE TABLE Code Model Language Description Accessories DCR3000 JP Japanese DCR3000 Setup disk Sensor connecting cable (2m, alligator clip) EN English Body fixing fastener (2pc) Be sure to read the Instruction Manual to ensure correct, safe use. Some specifications and design are subject to change with or without notice for improvement of quality and performance. CS HCS-E2823